error: use of undeclared identifier 'SIP_NULLPTR'

[Atomzdq]

(Python_3.5.2-PyQt_5.10) zhoudeMacBook-Pro:build zhou$ cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$VIRTUAL_ENV -DCMAKE_PREFIX_PATH=$VIRTUAL_ENV -DBUILD_STATIC=ON -DBUILD_PYTHON=ON -DBUILD_EXAMPLES=OFF ..
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/zhou/Documents/cura-environment/libArcus-master/build
(Python_3.5.2-PyQt_5.10) zhoudeMacBook-Pro:build zhou$ make -j4
[ 35%] Built target Arcus
[ 47%] Building CXX object CMakeFiles/python_module_Arcus.dir/python/sipArcuspart1.cpp.o
[ 47%] Building CXX object CMakeFiles/python_module_Arcus.dir/python/sipArcuspart2.cpp.o
[ 58%] Building CXX object CMakeFiles/python_module_Arcus.dir/python/sipArcuspart3.cpp.o
[ 58%] Building CXX object CMakeFiles/python_module_Arcus.dir/python/sipArcuspart0.cpp.o
In file included from In file included from In file included from /Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipArcuspart0.cpp/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipArcuspart3.cpp::1010:
:
/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipArcuspart2.cpp:10:
In file included from /Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipArcuspart1.cpp:10:
/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipAPIArcus.h/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipAPIArcus.h::163163::99:: warningwarning: : /Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipAPIArcus.h:163:9: warning:
'sipConvertFromSliceObject'
'sipConvertFromSliceObject' macromacro redefinedredefined [-Wmacro-redefined][-Wmacro-redefined]

/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipAPIArcus.h:163:9: warning:
'sipConvertFromSliceObject' macro redefined [-Wmacro-redefined]
'sipConvertFromSliceObject' macro redefined [-Wmacro-redefined]
#define sipConvertFromSliceObject sipAPI_Arcus->api_convert_from_slice_object#define sipConvertFromSliceObject sipAPI_Arcus->api_convert_from_slice_object#define sipConvertFromSliceObject sipAPI_Arcus->api_convert_from_slice_object
#define sipConvertFromSliceObject sipAPI_Arcus->api_convert_from_slice_object
/usr/local/include/sip.h:2021:9: note: previous definition is here
/usr/local/include/sip.h#define sipConvertFromSliceObject PySlice_GetIndicesEx:
2021:9
/usr/local/include/sip.h:2021note:: 9:previous definition noteis: hereprevious
definition is here
#define sipConvertFromSliceObject PySlice_GetIndicesEx
#define sipConvertFromSliceObject PySlice_GetIndicesEx
/usr/local/include/sip.h:2021:9: note: previous definition is here
#define sipConvertFromSliceObject PySlice_GetIndicesEx
/Users/zhou/Documents/cura-environment/libArcus-master/build/python/sipArcuspart3.cpp:29:9: error: use
of undeclared identifier 'SIP_NULLPTR'
SIP_NULLPTR,

What I should do to solve this problem?Thanks!

[Ghostkeeper]

SIP_NULLPTR was added to Sip in version 4.19.14. Which version of Sip are you using?

[Atomzdq]

@Ghostkeeper 4.19.14. I figure out that my gcc version is 4.2.1 ,should I update it to the newer one?

[Ghostkeeper]

Oh yeah that could help. We build it using GCC 4.9 on our build server (and I'm using 8.2 in my development environment). As far as I know we've always required version 4.9.2 or higher.

[Atomzdq]

@Ghostkeeper I found that My sip version is 4.19.8. It's up to date from homebrew. What should I do to solve this problem? I update GCC version to GCC5.But this problem still happen.

[Ghostkeeper]

I looked it up, now, and I'm using SIP 4.19.12, but it shouldn't matter much.

I think that your problem is more along the lines of that it's using a different version of SIP to generate the C++ source code than the SIP headers that get linked to that source code. I don't know how to debug that for you though. It needs a lot of rummaging around through CMake.

[Fulg]

For some reason libArcus always uses the global SIP, not the one from the current env. The workaround is to uninstall SIP from Homebrew (because it is outdated!), and install SIP 4.19.14+ from source into the global Python env. I don't know how to fix that from the CMake files.

[Ghostkeeper]

Did you see if you could change the following CMake variables:

• SIP_BINARY_PATH
• SIP_EXECUTABLE
• SIP_INCLUDE_DIR
• SIP_INCLUDE_DIRS (I believe this one is just left in my CMake cache because of older versions.)

[NikhilAshodariya]

Hello,

I tried all the things but none of them worked. Can anyone please suggest a solution. Thank you.

[Ghostkeeper]

I encountered this myself today. The solution was to dig into the CMake parameters (toggle advanced) and make sure that SIP_EXECUTABLE was set to refer to the same Sip version as SIP_INCLUDE_DIR. In my case, both needed to be an older version (4.19.8). The Sip executable then no longer generated source code that contains the SIP_NULLPTR reference which is not present in the headers.

Like Fulg says, for some reason it always finds the Sip executable installed on my system. But it does snap to the Sip headers in my installation folder as desired. If the two are incompatible you'll get this error.